//   6/22/09   M. Brenner

import	javax.microedition.lcdui.*;


public class Convertio
{
	static private final int	MAXWIDTH = 10;

	private Command		convert_,
				exit_,
				setup_;

	private ConvertGui	gui_;

	private Form		form_;

	private TextField	euros_,
				dollars_;




	public
	Convertio (ConvertGui gui)
	{
		String		rate;


		gui_ = gui;

		form_ = new Form ("Convert");

		dollars_ = new TextField ("Dollars", "", MAXWIDTH, TextField.DECIMAL);
		form_.append (dollars_);

		euros_ = new TextField ("Euros", "", MAXWIDTH, TextField.DECIMAL);
		form_.append (euros_);

		rate = Preferences.getinstance().getpreference ("RATE");
		form_.append (new StringItem ("", "(Rate: " + rate + ")"));


		exit_ = new Command ("Exit", Command.EXIT, 0);
		form_.addCommand (exit_);

		convert_ = new Command ("Convert", Command.OK, 0);
		form_.addCommand (convert_);

		setup_ = new Command ("Setup", Command.OK, 0);
		form_.addCommand (setup_);

		form_.setCommandListener (new CommandListener() {
			public void commandAction (Command c, Displayable disp)
			{
				if (c == convert_) {
					convert();
				}
				else if (c == exit_) {
					gui_.exit();
				}
				else if (c == setup_) {
					gui_.setprefs();
				}
			}
		});
	}


	private void
	convert()
	{
		double		converted,
				rate,
				value;

		Converter	converter;

		String		text;

		TextField	dest;



		rate = Double.parseDouble (Preferences.getinstance().getpreference ("RATE"));
		if ((text = euros_.getString()).length() > 0) {
			dest = dollars_;
			value = Double.parseDouble (text);
			rate = 1/rate;
		}
		else {
			dest = euros_;
			value = Double.parseDouble (dollars_.getString());
		}

		converter = new Converter (rate);
		dest.setString (converter.convert (value) + "");
	}


	public Form
	getform()
	{
		return  form_;
	}
}